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N. PETERS, PHOTO LITHDGRAPHER WASHNGTMN D C @MMD tateljstrnt @fitte Vhave invented certain new and us vcams CC' C.

'11mm-AN P. KEELERI or WORCESTER., MASSACHUSETTS.

Letters Patent No. 78,291, datefZgMag/ 26, 1868,.

nnn'wvsn ADJUSTABLE HAMMER AND-oser.

`KNOW ALL MEN BY THESE PRESENTS:

That I, 'ilRUMAN 1).,K-EELER, of the city and county of Worcester, and Commonwealth of Massachusetts,

eful Improvements in Combined Adjustable Hammers and Drops; and I'do hereby declare that the' following is'a full, clear, and exact'description of the same, reference being had to the nceompanying drawings forming a partl of this speciication, in Vwhich- Figure 1 represents a. side VView of my improved tripfhanimer and drop.

Figure 2 represents a front view ofthe same, and

Figure 3 represents a longitudinal centralsection on line A B, g. 2.

To enable those Skilled in the nrt to which rn to describe it more in detail.` l .Y

Mypr'esent improvements have for their object the production of a hammer that can be readily adjusted to strike with'a varying force, and which can also be adjusted tche used as a drop. 'y Y In the drawings, A is the base of the machine, from which iise the two side-pieces B B.,

The front parts B B ofthe side-pieces extend 11p-higher than the rear parts BNB. fitted the boxe's'lor bearings a a of the main shaft A', u pon which are mounted `the varyi y in-vention belongs to make and use the same, will proceed The ca.m-shaft'Ay is tted to Vslide easily in a longitlidinal direction, to,bring either of the cams under the ami D, which extends back from the hammer D, which is tt ed to work up and down between proper guides or ways b b, attached inany proper manner to the front parts B B ofthe side-pieces B B.

A triangular lever, c, is liinged at 1, the upright or forked end d of which ext enter a. groove cut in the shaft A', as indicated in red dotted lines in iig which extends out through the side of the frame, as shown at ,in g. 2, is depressed or elevated, shaft Al and its cams will be moved one way or-the other, as the case may be. A

Upon the outside of the frame, the lower end ofthe connectingend of the sam'e connection is pivoted to the' crank-arm E of the shaft Ev, which is supported and turns in boxes or bearings, fastened to the upper ends of theparts B B.

Fastened to shaft E is the stop-block F, having, i'n this instance, two notches F' Il.

Rubber hunters g are inserted in the faces 2, 3, and 4A of the stop-block F, for a. purpose hereafter named.

' To one of the side-pieces B s fastened', by a hinge or pivot-joint, a stop-piece, and-6. When lever e is depressed, so` as to be held down by the notch 5 drawings, the stop-block'F r`.vill b'e dra'wn'in, so that the rubber bunter g in the face 3 will be in the proper posi.Y tion to receive and arrest the hammer D', as it is thrown up by the cam G',\vl1ich will be moved under the arm D, when lever e is in the position shown in the drawings.

piece E is pivoted to lever e, while the upper G, having two notches, 5

Upon the latter are. ng-or different-sized ends up, and` its pins 't' 'if 3, whereby, when the horizontal part e of the stop-piece G, -as shown in the i When lever e is depressed,'so as tobc caught'and held down by the notch G in the stop-piece G, cam C is moved under the arr-n D, and the stop-block 'F is swung out, so as toallow the hamm the bunter g in the faced, while, when the stop-piece G isldrawn out, so as to allow highest point by the spring la, the small cam-,CV is moved under the-arm D, bring the bunter g, in the face 2, into position to receive andar'restvthebou It will be observed that the operator can ver stroke, and, consequently, a hard or soft blow.

Shaft A is to be driven by a pulley, upon which runs a loose lever e tov be drawnup to its and stop-block F is'moved so as to nd of the hammer.

belt, to -be tightened by a binding-pulley,

when the hammer is to he put intooperation, and loosened when the hammer is to bestopped.

The hinder is to be combined with the'foot-treadle H, so that when the latter is depressed, as shown in red the hammer will stop, the

lines, fig. 3, the hammer will be put into operation, and whenthe font is removed, -trcadlebeing elevated by the springs K K-,or the weight of the binderpulleyx er to riseuntil arrested by" Y y easily-and quickly adjust the hammer to give a long or short;

I have new described how my hammer can be adjusted togive v.a hard or soft blow, ^and I will now explain hoiv it can be adjusted so as to'act as adrop, when either of the cams is moved under the arm D.

To the side arms -m m ofthe treadle H arehinged orpivoted theY lower ends of thc connections I I', to which the ends of the stop-bar J are fastened by vthe scrcp's Q z n. The ends of thestopsbar work up and: down in vertical slots in the side-pieces B B; l

The stop-bar J, it will be seen, will rise and fall with the treadle H, and when up, as shown in dark lines inthe drawings, will be struck by the projection o, on the outer side of`the cam C", thereby stopping the cams While the catchp is turned so as to catch into one of the notches q i'n. the hammer D', thereby retaining the hammer in the elevated position shownin iig. 3.

As the journal of the catchy passes through thel side-piece B, and its'arm s is connected to the upper endV of the connection I, as shown att, the catch is turned back, when the treadle H is depressed, all as shown in l red lines, fig. 3. 1 v

As soon as treadle H is depressed, as described, the hammer falls, and thc stop-bar J being depressed also,

.the cams are putin motion again, and acting upon the arm D, the hammer is elevated, but as the foot ofy the operator is immediately withdrawn from the treadle, it rises, the cams are stopped and the hammer caught again, p

ready to be dropped at the pleasure, of the attendant.

When it sdesired to run thehammer constantly, the attendant keeps his foot upon the treadle H. v

To guard against the cams being shifted while the hammer 'is being raised, the cams C C 'are provided with fins u, upon theirinner sides, as indicated by dotted lines,'iig. 1, and full lines, iig. 3.

The tins u prevent the cams being slipped laterally, until the point of `the arm D has been passed, when 4 they can be moved, even though thecams are 'still infoperation.

If preferred, in any case,`a spring, W, may be fastened to'the top-of the farm D, to aid in stopping and easing the bound of thehammcr as itis raised.

It is apparent'that'many of the parts' aboveldeserihed may bemodiiied withoutdeparting from the prin ciple ot" my invention. w i

Having described my improved-combined adjustable hammer and drop,what I claim as new und of my invention, and desire to secure by Letters Patent, is

1.. The combination, with the hammer., of an adjustable stop-block, F, and -mechanism for operating' the same, substantially as and for the purposes s et forth. g l A 2, The combination, with the hammer, of the stop-block, for checking its upward movement, the cams and cam-shaft, for operating the hammer, and the lever e, connected with and arranged .to adjust both the cams and the stop-block, substantially in the manner and for the purposes'shown and set forth. l

3. The combination, with the adjusting-lever, connected with the cam-shaftand stop-block, as specified, of the stop-piece G, or its equivalent, substantially as and for the purposes set forth. p

4. The stop-bar J, and treadle, or equivalent means for operating the same, in combination with the hammeractuating cams, under the arrangement and for operation as shown and set forth. i

5. The combination, with the hammer, and cams for operating the same, oi' thc stops pv and J, connected withand actuated by the treadle H, in the manner and for the purposes herein shown and specied. b

' 6. The combination and arrangement, vwith the hammer, its actuating-cams, and the stop-block for checking its upward movement, of the mechanisms herein described for adjusting said cams and stop-block, and for* arresting and holding the said can-,sand hammer, whereby the vmachine may be used either as a hammer or as a drop, and the stroke of the hammer, in either case, Vmay be varied, substantially as shown and set forth.v

I TRUMAN P. KEELER.

Witnesses:

Tiros.4 H. DODGE, GEO. H. MrLLER. 

